This June 2, 2010, file photo shows the AT&T logo in Washington, D.C. The U.S. Justice Department will seek to block AT&T's proposed $39 billion acquisition of T-Mobile. Etienne Franchi/AFP/Getty Images hide caption

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A screenshot of SFpark, an app that lets San Francisco drivers see available parking spaces as well as each space's cost. Courtesy of SFpark hide caption

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Online reviews are many, but it's often difficult to tell the real ones from the fakes. To help sort the genuinely delighted customers from profit-driven praise, researchers at Cornell University have developed software that can successfully tell the difference. Yanik Chauvin/iStockphoto hide caption

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A buyer tests a Motorola Droid phone in this photo from January. Google purchased Motorola for $12.5 billion, gearing up in a patent war that has seen corporations try to pummel their competitors. Julie Jacobson/AP hide caption

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Apple CEO Steve Jobs delivers the keynote address at the Apple World Wide Developers Conference in June. Jobs announced Wednesday that he would step down immediately as CEO of Apple. Justin Sullivan/Getty Images hide caption

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